I had the wierdest of thoughts (ain't TMTOWTDI wonderful?) ... 

sub update_thing
{
  my ($self, $x, $y, $u) = @_;
  if (ref $u and UNIVERSAL::isa($u, 'CODE'))
  {
    # use temp to keep the $u function from changing $_[0] ;-)
    my $val = $self->{cell}[$x][$y];
    $u = $u->($val);
  }
  # validate $u.
  if ($is_valid)
  {
    $self->{cell}[$x][$y] = $u;
}

[download]

called sorta like:

  $obj->update_thing(15000, 20000, sub { $_[0] =~ s[something][else]g;
+ $_[0] } );

[download]

No, not better than $obj->thing(15000,2000) =~ s[something][else]g. But a bit better than the other ideas going around, maybe? :-) If not better, at least different...

In reply to Re^7: Assignable Subroutines by Tanktalus
in thread Assignable Subroutines by dragonchild

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